* Right-to-left text support and five new languages: Arabic, Persian, Hebrew, Urdu and Kazakh. Opera 12 now comes in 60 total languages.Installing Opera 12 on Ubuntu:
With Debian- and Ubuntu-based distros, you can use Opera's repository to ensure that your system will always have the latest stable Opera version. Simply add the following line to your sources.list (/etc/apt/sources.list)

deb http://deb.opera.com/opera/ stable non-free

Type the following command to add the public key

wget -O- http://deb.opera.com/archive.key | sudo apt-key add -

Open the terminal and type following command to install Opera 12

sudo apt-get update
sudo apt-get install opera

After successful installation, you can open Opera 12 from unity 'Dash'